Saheeli, the Sun's Brilliance + Mana Echoes + Gemstone Array + Hyrax Tower Scout

Saheeli, the Sun's Brilliance

Mana Echoes

Gemstone Array

Hyrax Tower Scout

How it works

1. Activate Saheeli by paying and tapping it, creating a token copy of Hyrax Tower Scout with haste.
2. When the token Hyrax Tower Scout enters the battlefield, it and Mana Echoes trigger.
3. Resolve the Hyrax Tower Scout trigger, untapping Saheeli.
4. Holding priority, if you control less than four creatures that share a creature type with Hyrax Tower Scout, repeat steps 1 through 3 one additional time.
5. Resolve all Mana Echoes triggers, adding C for each creature you control that shares a creature type with Hyrax Tower Scout for each trigger resolved this way.
6. Activate Gemstone Array twice by paying 4, putting two charge counters on it.
7. Activate Gemstone Array's second ability twice by removing two charge counters from it, adding .
8. Repeat.